【正文】 入功率因素（ PF）接近１的優(yōu)點，采用 PWM 進行控制 ,其中控制方法采用的是電流滯環(huán)比較法，因 硬件電路簡單，屬于實時控制，電流響應快，對負載的適應性強，由于不需要載波，所以輸出電壓不含特定頻率的諧波分量，另外，這種控制方式，有利于提高電壓利用率 選擇適當?shù)墓ぷ髂Ｊ胶凸ぷ鲿r序 ,可使 PWM整流電路的輸出直 流電壓得到有效的穩(wěn)定值。同時也調節(jié)了交流側電流的大小和相位 ,實現(xiàn)能量在交流側和直流側的雙向流動 ,并使變流裝置獲得良好的功率因數(shù)。 關鍵詞：單相電壓型， PWM,整流，功率因素校正，功率因數(shù)，電流滯環(huán)比較法 ， Matlab，仿 吳敏華：單相電壓型 PWM 整流 2 Singlephase voltage source PWM rectifier Abstract Analysis of singlephase voltage source PWM rectifier circuit (power factor correction circuit) and working principle of work mode, power factor correction (PFC) technology was born in the 1980s, it adopts the high frequency switching is, has the advantages of small size, light weight, high efficiency, the input power factor (PF) close to 1, control, using PWM control method is parative, hysteresis current hardware circuit is simple, belongs to the realtime control, fast response to load current, the adaptability, because do not need carrier, so the output voltage excluding specific frequency harmonics, in addition, the control mode, and is helpful to improve the efficiency of selecting the appropriate working mode and work timing, can make the PWM rectifier circuit output dc voltage stability of effectively. Also adjust the ac current of the amplitude and phase, realize the ac and dc power in the bidirectional lateral flow, and make good converter device of power factor. Finally the simulation model is established, and its Matlab verifies the correctness of design. Keywords: singlephase voltage type, PWM, Rectifier, Power factor correction, The power factor, Current hysteresis parison, Matlab, Simulation. 華東交通大學畢業(yè)設計 3 單相電壓型 PWM 整流電路 目 錄 1 緒論 .................................................................................................................... 1 概述 ........................................................................................................... 1 本課題研究的意義 .................................................................................... 2 國內外研究現(xiàn)狀 ........................................................................................ 3 本論文研究的主要工作 ............................................................................ 3 2 PWM 控制技術 .................................................................................................. 4 PWM 簡介 ................................................................................................. 4 PWM 控制原理和應用 .............................................................................. 4 PWM控制的基本原理 ..................................................................... 4 PWM計算法和調制法 ..................................................................... 6 ....................................................................................... 7 PWM跟蹤控制技術 ......................................................................... 7 PWM 控制技術的地位 .............................................................................. 8 控制技術用于交流 —交流變流電路 ............................................. 8 PWM控制技術用于逆變電路 ......................................................... 8 PWM控制技術用于整流電路即構成 PWM整流電路 ................... 9 PWM控制技術與 相位控制技術 ..................................................... 9 3 功率因素校正技術 ............................................................................................ 9 吳敏華：單相電壓型 PWM 整流 4 功率因素校正簡介 .................................................................................... 9 ........................................................................................... 9 Boost PFC電路與 Buck 電路的對偶性 ..........................................11 ............................................................... 12 .................................................................................. 13 ...................................................... 14 有源功率因素校正（ APFC）技術 ......................................................... 16 功率因數(shù) (PF)的定義 ..................................................................... 16 ................................................................................. 17 .................................................................. 17 有源功率因數(shù)校正方法分類 ......................................................... 18 功率因數(shù)校正技術的發(fā)展趨勢 ..................................................... 22 提高功率因數(shù)的幾種方法 ...................................................................... 23 ： .................................................................. 23 ： ................................................................................. 23 提高功率因數(shù)的實際意義 ...................................................................... 23 對于電力系統(tǒng)中的供電部分 ......................................................... 23 對于電力系統(tǒng)中的輸電部分 ......................................................... 24 4 Matlab 仿真實驗 ........................................................................................... 25 電路的工作原理 ...................................................................................... 25 實驗要求 .................................................................................................. 27 仿真步驟和波形 ........................................................................... 27 華東交通大學畢業(yè)設計 5 ......................................................................................... 27 .................................................................. 28 ..................................................................................... 30 主封裝圖以及各子系統(tǒng) .......................................................................... 32 仿真結論 .................................................................................................. 33 5 結論和展望 ...............................................................................